To provide a polyamide resin composition which inhibits increase in yellowness even when it undergoes a long time or repeated thermal history and is excellent in mechanical properties such as toughness, and to provide a production method thereof.

In the method for producing a polyamide resin composition, a metal compound aqueous solution comprising a metal compound of the formula: AXBYO2(wherein, A is a group 1 metal element of the periodic table or is one selected from Cu, Ag and Pt; B is one selected from Al, Fe, Te, Ti, Sc, In, Y, Ni, Co, Cr, Mn, Ga and Rh; and X and Y satisfy the relations: 0COPYRIGHT: (C)2007,JPO&INPIT